Warp stop motion for looms



Aug. 25, 1925.

J. NORTHRQP WARP STOP MOTION FOR LOOMS Filed July 2. 1925 4 Sheets-Sheei'. 2'

Aug 25, 1925.

J. N'ORTHROP WARP s10? moqlofi FOR Looms 1 I Filed m 2, 1923 4 Sheets-Sheet 3 wq v Aug. 25, 1925.

4 Sheets-Sheet 4 J NORTHROP WARP STOP MOTION FUR LOOMS Flled July 2 1923 Zl/IlZfl/fifi:

Patented Aug. 25, 1925.

' UNITED STATES PATENT OFFICE.

JONAS NORTHROIP, OF HOPEDALE, MASSACHUSETTS, ASSQIGNOB TO HOPEDALE MANU- FACTURING COMPANY, OF MILFORD, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.

wear sror Mormon ron Looms.

Application filed Jul 2,1923. semis. mans.

Tov all whom it may concern:

Be it known that I, JONAS Non'rnnor, a citizen of the United States, residing at 'Hopedale, in the county of Worcester and a State of Massachusetts, have invented cer-. tain new and useful Improvements in Warp Sto Motions-for Looms; and I do hereby dec are the following to he a full, clear, and exact description of the invention, such as will enable others skilled in'the art to which it appertains to make and use the same;

The present invention relates to an improvement in warp stop motions for looms.

The object of the invention is to reorganize and improve the construction of warp stop motions, and to this end the invention consists in the improvement in warp. stop motions hereinafter described and particularly definedin the claims.

ferred form of the invention, FigJl is'an end elevation of a loom provided the. present warp stop motion; Fig.2 is a sec tional elevation 1113. plane parallel. to the plane of Fig. 1 looking from theother side; Fig. 3 is a similar v1ew of the parts in a different position; Fig. 4 is a section'on the line 4-4, Fig. 2; and Fig. his-'aplan of the parts With the ratchet'showniin .sec- ,tion. a

The loom frame 1 is provided with a breast beam 2, ship er lever 3 and lay 4, which are or may e all as usual in this class of looms. The warp detectors 5 are 35 mounted on the detector bars 6, and each is provided with. a threaded warp which 13 extended from the frame of the loom forward to the lay. When a' warp breaks the warp detector drops and the feeler 7 strikes 'the operating detector and acts to stop the loom. The feeler 7 is mounted on the feeler shaft 8 which carrieson its 11 per end the lever 9 connected by means 0 the link 10 with the feeler actuating plate 11 ivoted at 12 on the plate bracket 13. 'The link 10 extends through a hole in a hpss mounted on the side of the shoe .14 which normally rests in a depression in the feeler plate 11. The shoe 14 carries a cam In the -drawings illustrating 7' the .long as the shoe rides in the de ression 15 the detector plate no vertica motion is unpartedto the hunter carrier lever, but the feeler continues to be actuated through this means. The detector plate 11 is provided with an arm 18 which is pivotally connected to the link 19 which extends to a hrack-. et 20 secured to the weft hammer 21 actuated by the weft hammer cam 22 in the usual manner. Thus the weft hammer oscillates the detector plate 11. l

If new one of the detectors or drop wires 5 falls from the position shown in Fig. 2 to the position shown in'Fig. 3', then the feeler 7 is arrested by engagement with. the fallen wire. For example, suppose a wire fallsvwith the detector plate occupying the position shown in Fig. 2, and then as the detector 7 moves forwardly, strikes the fallen wire and is-therehy arrested and held from further movement, the detector plate 11, however, continues its movement underneath the shoe which is standing still, and lifts the shoe up, thereby lifting the hunter cgrrying lever 17 which, at its end, carries t e unter bar 23. The hunter bar 23 extends downwardly from. the hunter carrier lever 17. and is received between the arms 24 of the guide 25, and below such guide is provided with a hunter 26. With the parts in the position shown in Fig. 2 the hunter is located below the dagger 27 carried by the lay, and the dagger passes over the hunter. When the hunter is lifted up as shown in Fig. 3, the dag-[gar 27 strikes it and moves it rearwardly. o the lower end of.

the hunter lever 23 is pivotally attached at 28 the link 29 which extends rearwardly and is connected at its forward end to a knockoif lever 30 by which the shipper lever is knocked off. i V

The mode of operation is apparent from the foregoing" description of the parts and vrelative movements. It will be observed that the hunter carrier lever is provided on its under surface with a curved face which is' formed on the arc of a circle of which the pivot 12 is the center, so that as the detec tor actuating late 11 is reci rocated', carrying with it t e shoe 14, the unter carrier lever 17 is not oscillated" upon it'sfpivot on the bracket 13. But when the-shoeis arrested hy engagement ofi'the feeler with a drop wire, the cam surfaces-on the detector .slight pressure as ma be caused late lift the shoe and thereby the unter carrier and the hunter so as to pre-' sent the latter to the dagger on the lay,

It will be seen that when the feeler is arrested by a fallen drop wire and the shoe" 14 thereby raised 'out of the depression "15 the continued inotion of the oscillating'parts will-cause no further-pressure to be exerted by the feeler on the drop wire, exce t suizlh y t e drag mg friction" of t e feelerplateupon the 8 0e. Prior warp stop motions ordi narily employ actuating devices. which cause a s ring pressure to force-1 the feeler against t e drop wire, thereby tending tobend or otherwise injure the later when the feeler has been arrested According to thepresent invention any injury to the dropwire due to the engagement with the feeler is substantiall eliminated, even where drop gaging the shoe normally acting to hold it in the depression in the detector plate but perht wei ht are used. v escribe the invention, what 1s:-- 4

wires of very Havm thus is clalme 1. A warp stopmotion for looms having,-

in combination, warp detectors, a feeler, ac- .tuatingmeans for the feeler comprising a detector plate having a depression, cam surfaces on each side thereof, a shoe connectedwith the feeler,a lever-having a portion en mitting the arrest of the feeler and the lift ing of the shoe by the cam surfaces on the detector plate, sald lever having a portion received on the shoe, a hunter. carried by the lever, a dagger carried by a reci rocating part of the loom, the hunter carrier acting to lift the hunter into the path of thedagggr when the feeler is arrested, connections.

tween the hunter and the shipper lever for knocking 01f the shipper lever when the Q dagger strikes the hunter.

rical cam surfaces on" ea shoe connected with the feeler having a por 2. A warp stop motion for looms having, .in eombinatwn, warpmdetectors, a feeler, ac-

tuating means for t e feeler com rising a pivotally mounted detector plate aving a surface provided with ads res' sion,.symmetside thereof, ,9,

' part. of the loom, aship tion adapted to normally rest in the depression of the detector plate, a hunter-carrier lever 'pivotall mounted on a stationary part of the loom, aving a surface engaging the shoe of such a curvature that when. the shoe rests in the depression in the detector plate,

such surface is the arc of a circle of which the pivot of the detector plate is the center so that oscillations of the detector plate and 1 shoe under the bunter-carrier lever are inoperative to move that lever which acts to [hold-the ,shoe in the depression, abunter carried'by the bunter-carrier lever, adagger carried the" bunte -carrier lever acting to lift the f bunter into the\ path of the dagger when the feeler is arrested, actuatin means for the by a reciprocating part of the loom,

pression, means for oscillating the detector plate continuously during the operation of the loom, 'a shoe normally resting in the depression'of the detector plate, connections etween the shoe and the feeler, ressure app ying means acting to. press the s oe into the depression of the etector plate, a hunter,

connections between such pressure applying means, and the hunter, a da 1 on a moving I per lever for the loom, such pressure a p yin means yield: 'ing when the :feeler strikes a etector where ,u on the shoe is arrested and the feeler of'its cam surfaces to lift the pressure1ap p ate, continuing its movement, acts by "one plyinglmea'ns and thereby to move thebunter mto t e path of. motion of the dagger, and connections between the hunter and the shipper lever to knock off theloom.

4. A'warp stop motion for loomsphaving, in combination, a feeler, drop wires normally supported by the warps out of the path of motion of the feeler, actuating means for the feelercomprisin a detector plate, means for 'movin the etector tinuously during 51c operation 0 fplate conthe loom,

a shoe, connections between'the shoe and the feeler, said detector lp'llate being provided with asurface upon w 'ch the shoe is ada t ed to rest, a depression in such surface of t e detector plate, in which depression the shoe normally remains but out of which the shoe may be lifted when the feeler is arrested,

. ate having portlons to engage the shoe and simnetrically disposed cams on the detector I it it out of the depression when the shoe is arrested by the sto ping of the feeler, a

device-for applying ight pressureto the shoe normally acting to hold the shoe in the said detector plate acting when said shoe is depression in the detector plate and havin arrested to move the shoe and thereby to a surface engaging the shoe which is paralle move said pressure applying means, a shlp- 10 to the motion of the detector plate so that P level: h 1 m n connectlons bewhen .the latter reciprocates with the shoe tween fl d l v l and tile pressure applylng in its depression said pressure applying means is not moved, the cam surfaces on JONAS NORTHROP. 

